Tom Bodkin, managing director of the UK-based adventure travel company Secret Compass, said the travel ban is "a bit of a shame".

"Tourism revenue is negligible to say the least", Mr. Cockerell said of money that North Korea might lose from the ban. The ban will become effective within 30 days of July 27, it added. However, they added that the ban also calls for invalidation of passport to any USA citizen who travels to the country after the 30-day grace period.

By that, South Korea usually refers to loudspeaker propaganda broadcasts by both sides, whileNorth Korea wants an end to joint US-South Korea military exercises.

A senior Trump administration official has confirmed to CBS News that the USA government will ban American citizens from traveling to North Korea from the end of August.

Kim Jong-Un consistently denies human rights abuses in his country and blames the USA for being the world's worst violator of human rights.

Rowan Beard, of Young Pioneer Tours, told the BBC that the embassy was trying to check the number of U.S. tourists left in the country.

Secret Compass has brought three Americans among the 19 people it took to North Korea since launching tours there last fall, he said.

While the decision will be bad for business, he said he sees it as more damaging to "North Koreans who are interested in having a balanced portrayal of what Americans are really like".

The U.S. government has not confirmed news of the travel ban.

The Hawaii Emergency Management Agency is kicking off an educational campaign aimed at helping residents and visitors figure out what to do if the state is targeted in a nuclear missile attack from North Korea, reports CBS Honolulu affiliate KGMB.

U.S. intelligence indicates that North Korea is possibly planning to launch its next missile underwater as Pyongyang's submarine has been found sailing some 100 kilometers out to sea in global waters.

This month, North Koreaannounced it had successfully tested its first intercontinental ballistic missile (ICBM).

In May, two congressmen introduced the North Korea Travel Control bill to cut off the foreign currency the country earns from American tourists.

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